solved_exam2_09 - Thermodynamics I CHEMICAL ENGINEERING...

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Thermodynamics I CHEMICAL ENGINEERING 2300-001 MECHANICAL ENGINEERING 2300-001 Solution to Second Examination, Monday, 2009 November 16 Prof. Geoff Silcox Chemical Engineering University of Utah Problem 1.0 A geothermal power plant is being operated between temperatures of 200 C and 5 C in winter and 200 C and 25 C in summer. Estimate the percent drop in efficiency due to the warmer summer temperatures. As an approximation, assume the engines are reversible. 4123 . 0 473 278 1 1 winter H L T T 3700 . 0 473 298 1 1 summer H L T T The percent drop in efficiency is % 3 . 10 % 100 4123 . 0 3700 . 0 1 winter summer winter Problem 2.0 Steel ball bearings emerge at the rate of 1 kg/min from an annealing furnace at 600 C and are quenched in a water bath as sketched below. At what rate (kg/min) must liquid water at 15 C be supplied to the bath to maintain a constant water level? The pressure is 1 atm. You may assume the bath is well insulated.
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This note was uploaded on 09/02/2010 for the course PHYS 2300 taught by Professor Silcox during the Fall '09 term at University of Utah.

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solved_exam2_09 - Thermodynamics I CHEMICAL ENGINEERING...

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